src/test/model/MockObserver.java


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package model;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class MockObserver<T> implements Observer<T> {
    private int countPrev;
    private int count;
    private T data;
    private int dir;
    private int index;

    @Override
    public void accept(T data, int direction, int index) {
        this.count++;
        this.data = data;
        this.dir = direction;
        this.index = index;
    }

    public void assertCalled(int dir) {
        assertEquals(countPrev + 1, count);
        assertEquals(dir, this.dir);
        countPrev = count;
    }

    public int getCount() {
        return count;
    }

    public T getData() {
        return data;
    }

    public int getDir() {
        return dir;
    }

    public int getIndex() {
        return index;
    }
}